Copy text from one tmux pane to another (using vim)

You could use the system clip board with “*y and “*p instead of the normal y and p.

Unfortunately, I can’t add a comment yet to Alex Leach’s answer so I’m going to include an addendum here for Mac OS X users:

5. Enter Copies the selected text

If you are using vim and tmux on macOS (Tested on macOS 10.12.2, tmux 2.3):

(Assume that prefix key combination of tmux is prefix. The prefix is ctrl + b in defaults.)

• Copy:
  1. Press prefix + [ to enter copy mode.
  2. Use arrow keys to go to the start/end of text selection.
  3. Press ctrl + space (If you have set ctrl + space as prefix, Press ctrl + space + space instead)
  4. Use arrow keys to move to the other side of selection.
  5. Press ctrl + w.
• Paste:
  1. Press prefix + ] in insert mode.

If you have vim open, its better to use the vim copy paste to copy text.

Tmux copy paste will work, however there are several disadvantages.

First, when copying multiple lines of text, you will have to select multiple lines. Tmux copy paste typically doesnt understand that vim has line numbers or there are markings in the vim gutter (such as relative numbers/absolute numbers). As a result, it will copy those as well.

Secondly, I have found that if the text has certain language specific formatting, and you directly try to copy paste using tmux to vim, it will mess up the formatting. This can be avoided by using set paste!. However, this requires a lot more work.

Use "+y to copy and "+p to paste

Vim natively provides a method to copy paste between the vim buffer and the system clipboard, using either "+y or "*y. Then pasting using "+p or "*p. This will avoide copying the relative numbers in the gutter or other random marks which are not relevant to vim

I am connecting to my CentOS server on a Windows machine using ZOC terminal ssh client. Here is what works for me:

• Enter copy mode: <prefix>+[
• Start copy: <Space>
• Copy text: <Enter>
• Paste text: <prefix>+]

A couple of options for vim use since the tmux shortcut sequence is bit long and I find it hard to remember

Like the answers above said you can use "+y and "*y to copy and then "+p and "*p respectively to paste. If you want vim to use the clipboard by default so you can just use y/p directly then.

set clipboard=unamed "sets the default copy register to be *
set clipboard=unamedplus "sets the default copy register to be +

source for clipboard command: https://vi.stackexchange.com/questions/84/how-can-i-copy-text-to-the-system-clipboard-from-vim

I’ve had the issue myself and uploaded my .vimrc and .tmux.conf files here:
tvp-repl

You can configure tmux to

1. Copy the vim-pane selection to the clipboard,
2. Read the clipboard and paste it to another pane, and
3. Jump back to the original pane.

All you need to set up vim to copy to clipboard [visual mode Ctrl+c]:

set clipboard=unnamedplus
vnoremap <C-c> "+y

Then have tmux command to run copying from vim and pasting the buffer to another pane [Ctrl+b Enter]:

bind-key Enter run "tmux send-keys -t 0 C-c" ; 
run "tmux select-pane -t 1" ; 
run "tmux set-buffer "$(xclip -o -sel clipboard)"; tmux paste-buffer" ; 
run "tmux send-keys -t 1 Enter" ; 
run "tmux select-pane -t 0"

Notice:
a) This script requires xclip to interface with the clipboard.
b) Assumption is vim is in pane 0; target pane is pane 1.

I have chosen to use Ctrl+Alt+C and Ctrl+Alt+V to copy and paste within tmux. Tmux’s copy-mode-vi enables navigation within a tmux pane with vim keys hjkl^$..., rectangle mode is useful to copy table columns or when there are further splits within the pane, activate it with r.

Here is how I set it up in ~/.tmux.conf:

bind P paste-buffer
bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-selection
bind-key -T copy-mode-vi r send-keys -X rectangle-toggle
# Also copy to system clipboard
bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel 'xclip -sel clip -i'
# map copy mode to ctrl+alt+c
bind-key -n 'C-M-c' copy-mode
# map paste buffer to ctrl+alt+v
bind-key -n 'C-M-v' paste-buffer

I created this setup by modifying this blog post.

This copy-paste solution will also work if the 2 tmux panes (vim instances or anything else) are on different machines (one remote, one local).